Yes several states did. Maine and NY and a couple of others in the NE. You had to provide proof of quarantine to stay in Maine. They didn't stop you at the border or anything. Although the Maine Governor did say she didn't think it would be legal to close borders.
Some info.
https://www.click2houston.com/news/national/2020/06/24/ny-nj-conn-to-quarantine-visitors-from-worse-off-states/